It was extremely rusty and the purchase price was high, so I hesitated for a moment, but I went ahead and bought it and polished it up, and it turned out to be in great condition. It's a stand light with a ball joint base, which is rare for a Japanese product.
The bulb is an E26. The plug and cord have been replaced. This is one of my top three purchases this year, but its simplicity makes it hard to photograph. This is a Japanese-made industrial light that I'd like you to see in person if possible.